6 files changed, 13 insertions, 4 deletions
diff --git a/tests/test_auth.py b/tests/test_auth.py
index 9ca48947..e9c75fd5 100644
--- a/tests/test_auth.py
+++ b/tests/test_auth.py
@@ -32,7 +32,7 @@ from paramiko import AUTH_FAILED, AUTH_PARTIALLY_SUCCESSFUL, AUTH_SUCCESSFUL
 from paramiko.py3compat import u
 
 from .loop import LoopSocket
-from .util import _support
+from .util import _support, slow
 
 
 _pwd = u('\u2022')
diff --git a/tests/test_client.py b/tests/test_client.py
index b5fe2e06..597c278e 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -37,7 +37,7 @@ import paramiko
 from paramiko.py3compat import PY2, b
 from paramiko.ssh_exception import SSHException
 
-from .util import _support
+from .util import _support, slow
 
 
 FINGERPRINTS = {
diff --git a/tests/test_sftp.py b/tests/test_sftp.py
index ac0d17fb..dac54a9b 100644
--- a/tests/test_sftp.py
+++ b/tests/test_sftp.py
@@ -42,7 +42,7 @@ from paramiko.sftp_attr import SFTPAttributes
 
 from .util import needs_builtin
 from .stub_sftp import StubServer, StubSFTPServer
-from .util import _support
+from .util import _support, slow
 
 
 ARTICLE = '''
@@ -88,6 +88,7 @@ unicode_folder = u'\u00fcnic\u00f8de' if PY2 else '\u00fcnic\u00f8de'
 utf8_folder = b'/\xc3\xbcnic\xc3\xb8\x64\x65'
 
 
+@slow
 class TestSFTP(object):
     def test_1_file(self, sftp):
         """
diff --git a/tests/test_sftp_big.py b/tests/test_sftp_big.py
index e5708312..a659098d 100644
--- a/tests/test_sftp_big.py
+++ b/tests/test_sftp_big.py
@@ -32,7 +32,10 @@ import unittest
 
 from paramiko.common import o660
 
+from .util import slow
 
+
+@slow
 class TestBigSFTP(object):
     def test_1_lots_of_files(self, sftp):
         """
diff --git a/tests/test_transport.py b/tests/test_transport.py
index 7fa67c43..9474acfc 100644
--- a/tests/test_transport.py
+++ b/tests/test_transport.py
@@ -44,7 +44,7 @@ from paramiko.common import (
 from paramiko.py3compat import bytes
 from paramiko.message import Message
 
-from .util import needs_builtin, _support
+from .util import needs_builtin, _support, slow
 from .loop import LoopSocket
 
 
@@ -257,6 +257,7 @@ class TransportTest(unittest.TestCase):
         self.tc.renegotiate_keys()
         self.ts.send_ignore(1024)
 
+    @slow
     def test_5_keepalive(self):
         """
         verify that the keepalive will be sent.
@@ -820,6 +821,7 @@ class TransportTest(unittest.TestCase):
                              (2**32, MAX_WINDOW_SIZE)]:
             self.assertEqual(self.tc._sanitize_window_size(val), correct)
 
+    @slow
     def test_L_handshake_timeout(self):
         """
         verify that we can get a hanshake timeout.
diff --git a/tests/util.py b/tests/util.py
index 051a36ba..4ca02374 100644
--- a/tests/util.py
+++ b/tests/util.py
@@ -22,3 +22,6 @@ def needs_builtin(name):
     """
     reason = "Test requires a builtin '{}'".format(name)
     return pytest.mark.skipif(not hasattr(builtins, name), reason=reason)
+
+
+slow = pytest.mark.slow